or a couple of pages further in... could be columnaris which is a bacterial infection... same a for humans bacterial infections need antibiotics... and in aquaculture pathogenic infections such as what cause red spot disease require formalin to kill the pathogen. As with any fish health issue, salt will help by reducing the instance of fungal secondary infections.

Thanks Monya, I've had a read thru those sections, they do seem grim, don't they. I'm now of the opinion of removing the fish, ridding the system of the infection and starting over. Would love to know where the disease started. Also would love to hear opinions on how to rid the system of the disease. Am considering Rups salting at 6ppt and Condes at 2ppt for a ftn, hoping to keep the veggies and gravel for "Mattquaponics Take 2".

these are my first fish. they were purchased from a fishy dealer north sunshine coast. I'll be contacting them first thing next week. is there any other way they might have caught this disease?? Water always from a tank? 2 different gravel supplies??

If I am salting my whole system at 6ppt for a 3000 litre system I would be needing 18kgs of salt? And with the Condes Crystals at 2ppm I would be looking at 60grams for the 3000 litres? Does that sound right or am I still failing math?

RupertofOZ wrote:

Yep... and yep...

You can get a 20kg bag of Sunray Pool Salt... pure seasalt... from Bunnings.. for <$10...

Condy's Crystals... no idea...

I've never been awesome at maths, but wouldn't 60gm for 3000lt be way too much? Woukd be more like 20ppm right?

Glad I double checked those calculations, otherwise I'd have a few more dead ones here this more.

I put in 2ppm of potassium permanganate last night. Figured it's my only option. Bio load is pretty small at the moment, so if it takes the good bacteria in the beds a while to grow back, it shouldn't matter too much.

One dead one this morning, but with the injury he's already got, I doubt he would have made it anyway.

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